The sale of art that Hitler allegedly painted has been a regular source of outrage over the decades.

The sales spark controversy in the art world, as collectors reveal their willingness to pay high prices for art linked to Germany’s Nazi past.

„Every time there’s a media buzz about it … and the prices they’re bringing in have been rising constantly,“ Stephan Klingen of the Central Institute for Art History in Munich told AFP. „Personally, that’s something that quite annoys me.“

The Weidler auction house has sold a number of paintings believed to be made by Hitler over the years, including one in 2014 that sold for $147,000, CNN reported.